Materials Literature
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Titanium dioxide thin films were prepared by spin coating of sol precursor onto microscopic glass slides, silicon and indium tin oxide (ITO) coated glass substrates. Spin speed was varied between 1000 and 6000 rpm. From the morphological analysis, it is found that thin films spun with speed ω⩽4000 rpm assume higher or…
Abstract Blends of a poly(2,6‐dimethyl‐1,4‐phenylene oxide) (PPO)/polyamide 6 (PA 6) alloy toughened with a novel polyolefin elastomer poly(ethylene‐1‐octene) (POE) were prepared via melt extrusion. In order to improve the compatibilization between POE and the PPO/PA 6 alloy, POE was grafted with maleic anhydride (MA)…
New approaches for domain structure determination of macromolecules from X-ray solution scattering are presented. An ab initio method for building structural models of proteins from the scattering data implemented in the computer program GASBOR employs simulated annealing to find a chain-like spatial distribution of d…
Using FcCOONa (Fc = (eta(5)-C(5)H(5))Fe(eta(5)-C(5)H(4))) as starting material, we obtained an unprecedented metal-organic coordination polymer containing ferrocenecarboxylate components [[Pb(2)(FcCOO)(eta(2)-FcCOO)(mu(2)-eta(2)-FcCOO)(mu(3)-eta(2)-FcCOO)(CH(3)OH)].1.5CH(3)OH.H(2)O](n) (1), tetramer [Zn(4)(mu(2)-FcCOO…
Small-angle X-ray scattering has been used to examine porous glasses. The experiment and analysis of the extracted data are described with specific concern for the quantitative characterization of the pore structure. The techniques used are illustrated by the results obtained from two selected porous glasses. Small-an…
Abstract The long‐term thermal stability of postused CaCO 3 ‐filled Polypropylene was evaluated through accelerated heat aging tests for about 2000 h. The material from old garden chairs was recycled by applying the remelting‐restabilization technique while using different stabilization systems in selected concentrati…
Reaction and crystallization kinetics play an important role in the recovery of enantiomers and polymorphs by crystallization. An approach that couples equilibrium phase behavior and kinetics is proposed for the design of such crystallization processes. A generic model that accounts for reaction, as well as crystal nu…
Time-resolved in situ small angle X-ray scattering measurements were carried out to monitor the formation of nanoparticles of cadmium sulfide, from a solution containing the corresponding acetate and thioacetamide under solvothermal conditions. Analysis of the SAXS data shows that spherical cadmium sulfide particles o…
Abstract The hydrosilation‐cured vulcanizates (HCV) of silicone rubber were prepared by using hydrogen‐containing silicone resin (HSR) as the crosslinking agent. The influences of both the amount and structure of HSR on hydrosilation‐curing silicone rubber (HCSR) were discussed. The results indicate that HSR is a good…
Abstract The spinel samples Co 1+ x Ti x Cr 1.2–2 x Fe 0.8 O 4 (0 ≤ x ≤ 0.6) were investigated at room temperature using Mössbauer, X‐ray, and IR spectra. The Mössbauer spectra for x ≤ 0.1 showed only broad six‐lines patterns and for 0.2 ≤ x ≤ 0.5 showed, in addition to the broad six‐lines patterns, a central paramagn…
A novel 1-D ferromagnetic compound based on copper(II) and hexacyanochromate(III) with formula {[Cu(cyclam)]3[Cr(CN)6]2·4H2O}n (1; cyclam = 1,4,8,11-tetraazacyclotetradecane) was synthesized and structurally and magnetically characterized. The compound crystallizes in the monoclinic system of the space group P21/n, Th…
The structural characteristics of polycarbosilane dendrimers with different molecular architecture were determined in solutions by small angle neutron and X-ray scattering. The same linear dimensions were sized up for the dendrimers both in benzene and chloroform. A solvent molecules penetration inside dendrimer struc…
A significant improvement in the sensitivity of a Huxley-Holmes design for a small angle X-ray scattering camera is obtained by separating the mirror and the monochromator. The "separated optics" camera described in this paper involves a long X-ray mirror close to a point X-ray source associated with a curved focusing…
Abstract Poly(ethylene terephthalate)/polypropylene (PET/PP) blends of different compositions were extruded through a 2‐mm capillary die using a corotating twin‐screw extruder. The extrudates were cryogenically fractured and examined using scanning electron microscopy. The viscosity ratio of the constituent polymers a…
The synthesis of a polyphenylene dendrimer carrying three perylenemonoimide dyes as well as one biotin group is presented. Due to the hydrophobic polyphenylene scaffold, this dendrimer is insoluble in water thus preventing investigations in aqueous media. However, the use of an appropriate detergent results in the for…
Abstract The nonisothermal crystallization kinetics of poly(propylene) (PP), PP–organic‐montmorillonite (Org‐MMT) composite, and PP–PP‐grafted maleic anhydride (PP‐g‐MAH)–Org‐MMT nanocomposites were investigated by differential scanning calorimetry (DSC) at various cooling rates. Avrami analysis modified by Jeziorny a…
Single crystals of calcite exhibiting a morphology of well-defined 8-armed stars, which evolved from original rhombohedral calcite crystals with their 8 points extending radially into eight arms, were produced by crystallization of CaCO3 in agarose gels.
Slow formation of J-type helical aggregates occurs when the simple achiral zinc octaethylporphyrin interacts with enantiopure 1-cyclohexylethylamines in the solid state. These chiral solid-state aggregates exhibit a high degree of optical activity and are remarkably stable, as evidenced in the circular dichroism spect…
The transformation of gibbsite to boehmite in strongly caustic solutions was studied using quantitative X-ray diffraction, Fourier transform infrared spectroscopy, and transmission electron microscopy techniques. Under hydrothermal conditions, we identified two transformation mechanisms: (1) dehydration and in situ nu…
This paper reports a structural study of 3 and 10 monolayer (ML) thick NiO films grown on Ag(001). Polarization-dependent X-ray absorption spectroscopy at the Ni K edge allowed us to obtain an accurate description of the local atomic environment of the Ni atoms up to the seventh coordination shell, including the deter…